Simon Philip 
Esme’s Rock [PDF ebook] 

Esme is a small cave girl. She has the kind of voice that’s great for keeping big things with sharp teeth away but that isn’t so great for keeping secrets, like the plans for Morris the mammoth’s birthday surprise. But when the birthday surprise is in danger of not being finished on time, it is Esme’s booming voice that brings people together, makes sure the job is done, and allows the party to go with a real swing!